Random Phase Music Generator
- Generates Steve Reich-like music randomly and puts into MIDI Files
- http://phase.sourceforge.net/

xphat
- A MIDI slider/fader box for Linux/X.
- http://www.equalarea.com/paul/xphat/

MIDI & Sound Applications
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- http://linux-sound.org/

Brahms
- KDE Music System - A Cubase-like music system for linux
- http://brahms.sourceforge.net/

MIDI programming in Linux
- Text with C++ examples by Craig Stuart Sapp.
- http://www-ccrma.stanford.edu/~craig/articles/linuxmidi/

MIDI-Perl
- A suite of Perl OOP modules which allows MIDI files to be read in and manipulated, or composed anew, and written out as MIDI files.
- http://www.speech.cs.cmu.edu/~sburke/pub/perl_midi/

The Computer Music Project
- Carnegie-Mellon presents Nyquist, a sound composition language and CMU MIDI Toolkit - a collection of software for writing interactive MIDI software in C, for Linux, DOS and Amiga.
- http://www.cs.cmu.edu/afs/cs.cmu.edu/project/music/web/music.software.html

GN MIDI Solutions
- Some MIDI utilities including source code
- http://www2.iicm.edu/Cpub